Chemical Sensors for CO/NOx-Detection in Automotive Climate Control Systems 960692
A new air quality sensor for climate control in automobiles has been developed. The sensor is designed for use in air conditioning systems with an air intake flap and a charcoal filter. The main indicators for the detection of air pollution are CO and NOx.
The sensor elements consist of a SnO2 layer made in thick film technology resulting in small sensor size and high sensitivity at reasonable cost. The sensor elements are packaged together with an evaluation circuit in a water resistant sensor housing for underhood installation. By means of specific dopants the sensor elements have been optimized in order to detect CO and NOx with very low cross-sensitivity.
This paper describes the design and production of the sensor. The performance of the complete unit under typical field conditions is presented. The sensor is in serial production.
Citation: Ingrisch, K., Zeppenfeld, A., Bauer, M., Ziegenbein, B. et al., "Chemical Sensors for CO/NOx-Detection in Automotive Climate Control Systems," SAE Technical Paper 960692, 1996, https://doi.org/10.4271/960692. Download Citation
Kurt Ingrisch, Astrid Zeppenfeld, Michael Bauer, Botho Ziegenbein, Heiner Holland, Bernd Schumann
Robert Bosch GmbH
International Congress & Exposition
Advances in Automotive Climate Control Design-SP-1152, Sensors and Transducers-PT-68, SAE 1996 Transactions - Journal of Passenger Cars-V105-6